Art of metallurgy.



ART 0F METALLURGY..

APPLICATION FILED JAN.28,1905.l

2 SHEETS-SHEET l.

PATENTBD JUNE 19, 1906.

E. A. TQUGBDA. ART 0F MBTALLURGY.

APPLICATION FILED JAN. 2B, 1905.

2 SHEETS-SHEET 2.

l lllllllll NITEI) STATEB PATENT ornicn.

ENRIQUE A. TOUCEDA, OF ALBANY, NEW YORK.

ART OF METALLURGY.

Specification of Letters Patent.

Patented .Tune 19, 1906.

Application led January 28. 1905. Serial No. 243.015.

.ing drawings and the reference characters marked thereon, which form a part of this specification.

Similar characters refer to similar both figures therein.

" Figure 1 of the drawings is a central vertical longitudinal section of'a coal-burning parte in 2o reverberatory furnace adapted for the practice ofmy invention. Fig. 2 is a view, partly in elevation and partly in cross-section, of the same.

VThe principal objects of this invention are t0' secure greater economy in time and fuel and to permit without increased fuel expense a wider range in the chemical composition of the. material under treatment in the operation of metallurgical furnaces.

Other ob'ect's will appear in connection with the folllow'ing description.

The invention consists in the method of procedure hereinafter set forth, whereby heat `o f comparatively low intensity escanin from a metallurgical furnace is converte into electrically-generated heat of comparatively high innsity and returned Within the furnace.

The invention is a plicable in the use of various kinds of meta lurgical furnace adapted for burning solid liquid, or gaseous fuel,

and it is particularly adapted for use. in a A non-regenerative reverberatery furnace in the process of preparing iron for malleable castings, in connection with which it will be' more articularly described.

In triie known types of non-regenerative reverberatory furnace, whether adapted for solid, liquid, or gaseous fuel, less, perhaps, than ten per cent. of the total heat units available in the fuel is communicated tothe materials on the hearth, the remainder lof such heat usually escaping throughl the stack, as iswell understood. y thoseskilled in the art. It has been thus far found impracticable to profitably utilize this enormous waste of heat in non-regenerative furnaces intermittently' operated, as in preparing iron for malleable castings, and-such furnaces in use to-day show no I material improvement whereby a greater percentage of eat units can be utilized from the fuel than was possible in the original type of furnace of this class many years ago, with only the X-' ception that air is now judiciously introduced over the grate-bridge wall to insure more perfect combustion, it being a notorious fact that less improvement has been made in the type of-reverberatory furnace referred to-than in any other furnace in which metallurgical operations are conducted. n y A l By the use of my invention I amable to save and return within 4the furnace in highly efficient form a large ercentage of such heat as would 4otherwisebe lost, resulting in a large saving intime and fuel in the operation of the furnace, as well as adapting'it' for a wider range lof use, as willbe hereinafter more fully set forth. l

Referring. to the drawings, wherein is shown a preferred form of apparatus for the practice of my invention, 1 is the fire-box, provided with the grate 2, adapted for burning solid fuel, as coal, the heated ases from the fire-box being deiected by t e arched ceiling 4 toward the hearth 5, all constructed and adapted t'o operate in substantially the same manner as the 'ordinary coal-burning non-regenerative reverberatory furnace.

Between the hearth-chamber and the stack 6 is located a steam-boiler 7, Which may be of any known type adapted for the generation of steam by the heat derived from the gases esca ing from the hearth-chamber to the stac which gases after passin said boiler are permitted to escape throng the stack. steam-supply pipe 8 leads from the boiler 7 to a steam-en ine 9, which may be of any known form an which is connected with a dynamo l() to operate the-same. Said dynamo is connected by wires 11 through a switchboard 12 in circuit with a pair of arcforming electrodes 13, Which project interiorly ofthe hearth-chamber in roximit to the hearth and in position for t e heat om said arc to be efficienti exerted upon the materials under treatin nt on the hearth. Any desired iiuinber of pairs of such electrodes ma be thus connected with said dy` name, an the switchboard 12 may be previded with the usual devices for. regulating IDO ITO

and controlling the supply of electrical energy to the electrodes.

Any known means may be employed to convert the Waste heat from the furnace into.

complished in anyknownmanner, and their.

position may bechangedl from time to time to adapt them for most advantageous use in .the particular metallurgical operation inhand.

It will=thus be seen that I am able to effectively supplement the heat due to the rever-- beratory action of the furnace by the heat generated by the electric heater within the hearth chamber, which electrically gener-4 ated heatis of great intensity and highly eilicient',` enabling me to secure froma given supply offuelthe effectiveness of' a greater numberof heat unitsl and4 al reat'er intensity of' heat than has heretofore een found possible in fuel-burning metallurgical furnaces. A

It will-be observed that such portion ofthe electrically-generated heat as may be ineffective'upon the materials on the hearth is not whollyl lost, but in passing to the stack again serves to heat the boiler, and a large percentage thereof' is again returned within the furnace through the electric heating-device.-

Aside from the saving in time and fuel accomplished by this inventionin the operation of' the reverberatory furnace the invention reatly enlarges the field of usefulness of the rnace, -due to the fact that it permits a much more perfect command over the furnace than was heretofore ossible, permitting reater liberties to be ta en with the chemical composition of the material under treatment, with a resultant large saving in time required for treatment, as the intensity, lo-

cation, and quantit of heat can be regulated in a manner best a apted fo'r 'the kind of material'under treatment and an increased output. secured; due to the saving in time.

B'y theterm furnace I intend to include 5o a single furnace element or a plurality or bat- 1 tery of such elements, only one of which is shownin the drawings, and I consider as coming within the scope of my invention the conversion of heat emanating from any part of such a furnace into electrically-generated heat within any part thereof.

I make no claim herein to the apparatus herein disclosed for the practice of my invention, as the same forms the subject of another December 5, 1905, as a division ofthe present application.

' What I: claim as new, and desire to secure by Letters Patent, is-

1. That improvement inthe art: ofmetal.- 65 lurgy which consists in converting int'o elec- -trical energy-heat emanatingfrom a metallurgical furnace, and converting saidl electrical energy into heat within the furnace.

2. That improvement in the art,v of metallurgy which consists in converting intoelectrical energy heat passing from the hearthofl a reverberatory furnace, and converting said: electrical energy into heat adjacent to the hearth Within the furnace.

8. That improvement in the art. ofmetal- =lurgy which consists in converting into'electrical energy heat passing from the hearth of' a non-regenerative reverberatory furnace, and converting said electricalv energy into 30 lheat within the furnace. y

4. That improvement inthe art of'metallurgy which consists in converting into electrical energy heat emanating from vareverberenergy an electric arc adjacent to the hearth. Within the furnace;

5. That improvement. in the art of metallurgy which consists in convertinginto steam energy heat'emanating from a metallurgical 90 Ifurnace, converting said steam energy into electrical energy, and converting said eleo- Vtrical energy into heat Withinithe furnace.

4In testimony whereofI have hereunto set my hand this 25th day of January, 1905.

ENRIQUE A. 'lOUCEDA-- Witnesses:

L. E. BARTON, JAMESv G. LUKE.

application by me, Serial N0. 290,391', filed 6o atory furnace, and forming by said electrical' 85 

